Positioning device in base for securing motor of blowers

ABSTRACT

A blower includes a base with a passage defined therethrough and a connection portion is located in the passage. A motor is received in the passage and includes a positioning frame which is fixed on the connection portion. A plurality of connection plates are fixed connected between inward protrusions extending from an inner periphery of the passage and the motor. A hood including an outlet is connected to an end of the base a fan device driven by the motor is received in the hood so that air generated by the fan device is sent from the outlet of the hood. The connection portion provides the motor a space between the floor where the base is put on and the motor.

FIELD OF THE INVENTION

The present invention relates to a blower with a base having a connection portion on which the motor is securely positioned.

BACKGROUND OF THE INVENTION

As shown in FIGS. 1 and 2, a conventional blower 10 generally includes a base 11 which is put on the ground and includes a recessed area 111 defined in an outer surface of the base 11. An inlet 112 is defined in the wall of the recessed area 111 for sucking air therethrough. A motor assembly 12 including a motor 121 which is inserted into the chamber 113 in the base 11 via an open top 114 of the base 11, and a fan device 123 which is driven by the motor 121 and located above the base 11. The motor 121 has lugs 122 which are fixed to recesses 115 defined in a top of the base 11. A hood 13 is mounted to the top of the base 11 and includes an outlet 131 such that air generated by the fan device 123 is send from the outlet 131. Nevertheless, the position of the inlet 112 is close to the ground so that dust and peddles are sucked into the blower and could damage the parts of the fan device 123 and the motor 121. Furthermore, the distance between the motor 121 and the base 11 is so small that heat generated by the motor 121 is difficult to escape so that the base 11 could be burned.

Another conventional blower 20 is shown in FIG. 3 and includes a base 21 with a chamber 24 defined therein so that the motor 22 is received in the chamber 24. A plurality of inward protrusions 25 extend inward from an inner periphery of the chamber 24 and connection plates 26 on the motor 22 are fixed to the protrusions 25 to position the motor 22 in the chamber 24. A hood 23 is connected to an end of the base 21 and includes an outlet 27 to send the air generated by the fan device (not shown) driven by the motor 22. It is noted that the motor 22 is hanged by the connection plates 26 in the chamber 24, so that the motor 22 tends to drop due to gravity and the connection plates 26 are easily deformed by any impact during transportation. Cracks may be found at the area of the base 22 where the connection plates 26 are connected if the impact is severe.

The present invention intends to provide a blower wherein the base includes a connection portion in the chamber and the motor is secured on the connection portion.

SUMMARY OF THE INVENTION

The present invention relates to blower which comprises a base with a passage defined therethrough which defines two openings in two ends of the base. A connection portion is located in the passage and a plurality of inward protrusions extend from an inner periphery of the passage. A motor assembly including a motor which is received in the passage and includes a positioning frame fixed on the connection portion, and a fan device which is driven by the motor. The motor has a plurality of connection plates connected between the motor and the inward protrusions. A hood is connected to an end of the base and encloses one of the two openings in the two ends of the base. An outlet is defined in the hood so that air flow generated by the fan device is sent therefrom.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view to show a conventional blower;

FIG. 2 is a side view to show the conventional blower in FIG. 1;

FIG. 3 shows another conventional blower;

FIG. 4 is a perspective view to show the blower of the present invention;

FIG. 5 is an exploded view to show the blower of the present invention;

FIG. 6 is an end cross sectional view to show the motor fixed on the connection portion, and

FIG. 7 shows two blowers of the present invention are overlapped with each other.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 4 to 6, the blower of the present invention comprises a base 30 with a passage 31 defined therethrough so as to define two openings in two ends of the base 30. A connection portion 34 is located in the passage 31 and a groove 341 is defined in a top of the connection portion 34. A plurality of inward protrusions 32 extend from an inner periphery of the passage 31.

A motor assembly 40 includes a motor 41 and a fan device 42 which is driven by the motor 41. The motor 41 is received in the passage 31 and includes a positioning frame 411 which is composed of tow elongated portions which are fixed on the connection portion 34 and located across the groove 341 so that a gap is defined between an inside of the groove 341 and the motor 41. The gap allows air flow passing through the gap to bring heat from the motor 41. A plurality of connection plates 412 are connected between the motor 41 and the inward protrusions 32. By the connection plates 412 and the positioning frame 411, the motor 41 is well positioned in the base 30.

A hood 50 is connected to an end of the base 30 and covers one of the two openings in the two ends of the base 30. The fan device 42 is received in the interior of the hood 50 so that air flow generated by the fan device 42 is sent from an outlet 51 of the hood 50. A filter cap 33 with a filter net 331 is fixed to the other opening of the base 30 so as to filter the air intakes from the opening.

The base 30 further includes two legs 300 extend from an underside of each of the two ends of the base 30 and a space is defined between the legs 300 on the two ends of the base 30 and the underside of the base 30. This ensures that an enough space is provided between the motor 41 and the floor so that heat from the motor 41 is not trapped to burn the base 30. Further referring to FIG. 7, a recess 35 is defined between the two legs 300 on each one of the two ends of the base 30 and two engaging portions 301 extend from a top on two ends of the base 30. The two engaging portions 301 are sized to be engaged with the recesses 35 when overlapping two bases 30 with each other to save storing space.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A blower comprising: a base with a passage defined therethrough so as to define two openings in two ends of the base, a connection portion located in the passage and a plurality of inward protrusions extending from an inner periphery of the passage; a motor assembly including a motor and a fan device which is driven by the motor, the motor being received in the passage and including a positioning frame which is fixed on the connection portion, a plurality of connection plates connected between the motor and the inward protrusions, and a hood connected to an end of the base and enclosing one of the two openings in the two ends of the base, the hood including an outlet.
 2. The blower as claimed in claim 1, wherein two legs extend from an underside of each of the two ends of the base and a space is defined between the legs on the two ends of the base and the underside of the base.
 3. The blower as claimed in claim 2, wherein a recess is defined between the two legs on each one of the two ends of the base and two engaging portions extend from a top on two ends of the base, the two engaging portions are sized to be engaged with the recesses.
 4. The blower as claimed in claim 1, wherein the connection portion includes a groove defined in a top thereof so that a gap is defined between an inside of the groove and the motor.
 5. The blower as claimed in claim 1, wherein a filter cap with a filter net is fixed to the other opening of the base. 